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Ground Steering Mechanism On Commercial Aircrafts  
User currently offlineCool777 From , joined Dec 1969, posts, RR:
Posted (13 years 2 months 16 hours ago) and read 4159 times:

Who knows how ground steering is performed on large commercial airplanes ? Is the nose wheel connected to the rudder pedals or, like in small airplanes, the steering performed by applying an asymmetrical breaks to the main landing gear ? And, whether the rudder panel is also moved when the airplane is taxiing ?

7 replies: All unread, jump to last
 
User currently offlineLaurent passet From , joined Dec 1969, posts, RR:
Reply 1, posted (13 years 2 months 14 hours ago) and read 4062 times:

steering on ground is performed by a short wheel closed to the sidestick for aibus. (2 wheels ,1 for 1st off. and 1 for captain)
when you turn this handwheel, the signal go to the Brake and Steering Control Unit (BSCU) and give information to the steering servovalve which apply hydraulic on the 2 steering actuator.
with the handwheel, you can turn the nose wheels at 78° in either direction (handwheel is available when aircraft speed in under 100kts)

you can also use rudder pedale for the steering but the steering angle is 2 to 6° , depend of the aircraft speed and if you use A/P.


User currently offlineVictor Alpha From , joined Dec 1969, posts, RR:
Reply 2, posted (13 years 2 months 13 hours ago) and read 4042 times:

As with Laurent, this wheel is know as the Steering Tiller. It's basically a steering wheel for the nose gear.



User currently offlineCdfmxtech From United States of America, joined Jul 2000, 1341 posts, RR: 26
Reply 3, posted (13 years 1 month 4 weeks 1 day 8 hours ago) and read 4012 times:

Boeing aircraft use cabling to control their steering system.
Aircraft such as the B747 and B777 incorporate Body gear (B747) and Main gear (B777) steering. The Main/Body gear steering is dependent upon transducers to realy the position of the nose gear. At a certain degree...(I think apst 70 deg), the main gear turns to lessen the wear on tires and gives a better truning radius.


User currently offlineTEDSKI From , joined Dec 1969, posts, RR:
Reply 4, posted (13 years 1 month 3 weeks 4 days 17 hours ago) and read 3944 times:

On a C-130 there is a small steering wheel to the left of the control yoke on the pilot's side.

User currently offlineCool777 From , joined Dec 1969, posts, RR:
Reply 5, posted (13 years 1 month 3 weeks 11 hours ago) and read 3891 times:

Is there a Steering Tiller on Boeings too, or the ground control performed using the pedals on these airplaines ?

User currently offlineNKP S2 From United States of America, joined Dec 1999, 1714 posts, RR: 5
Reply 6, posted (13 years 1 month 3 weeks 9 hours ago) and read 3882 times:

Both. Boeings employ a tiller or wheel ( depending on the model ) for steering but the rudder inputs provide a finer ratio input ( 7 degrees max ) for steering at high ground speeds.

User currently offlineMr Spaceman From Canada, joined Mar 2001, 2787 posts, RR: 9
Reply 7, posted (13 years 1 month 3 weeks 8 hours ago) and read 3877 times:

Hi guys.

> Cdfmxteck, you stated "Boeing aircraft use cabling to control their steering system". Can you please explain how these cables are attached to the hydraulic system used for the nosegear steering of a Boeing 747.

In the photo below of a 747's nosegear, you can see the hydraulic steering actuators on the aft side of the strut, near the ramp workers head.

Are there cables that run from the cockpit's tiller wheel and rudder pedals down to a hydraulic pump for the nosegear steering? If so...do you know the route?

What a cool photo!

Click for large version
Click here for full size photo!

Photo © Frank Zahorik


Chris  Smile



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